A cobpokatiost



G. L. KOLLOCK AND R. P. MARTN.

Auronmlc H/.Mlwml APPLICATION FILED NOV. 9.15)!7.

m-TED STATES. FTENT ernten.

. cnones L KoLLoeK Aun'noennrr.irnngrigor snerrLE, WASHINGTON, Assrelvoas -ro UNIVERSAL-nennen COMPANY, orsnApTrLn, Wirsnmeron, n onrozce'rroi;

or WAsHI'neron.k

Leiders.' fr;

d .Y Appiptgm mee Negenxbqr 3,191?. seriairmeeriis.

' zen' 'ofthe United States, residing atSeattle,

in the county et' King 'riidState of 1IWe'shing- `ton, have inif'ented certain new and usetul Improvements 111 Automatic' Hammers= the .10'k followingv being a full7 clear, and exact disu closure f ,t-lie' one 'forni oi.:- our invention *which ive rt-present deeniwpreferahle.

` Fora detailed description of the Vpresent "l formot' ourinvention,y reference may be'had to' thefollowing specification and to the' aecompanying draiving, which shows a Alongi tudinal section oi" our device.

- Our invention relates to an automatic hainu nier ywherein the hanginer `element or strikerf 20 is actuated `by a spring.- 'and the spring is periodica-ll)v tensioned and-released by 'aroJ tary motor.A

which a 'hollow or annular cani is employed Vand ourinvention relates chiefly to the means :for utilizing the-cam to alternately tensionl andfrelease the spring@ Referring to the drawing,-

represents ,Hone partfo't' a cylindrical two-part casing; theother, or second part of said`-.casing loe-Vl *i1-ig, represented at B. Within the first part vof the casing'is an electric-motor armature havingits shaft extending Vlongitudinally o1vthe casino. The field-magnet ot the motor is 35. formed by the steeloffthe casing onthe inside ot' which lare the inwardly vprojecting poles surrounded' by. the exciting coils C. Atthe upper end is secured a handle D and a cap-(plate E closes` the enel of the. casing 40 and carries one of the bearings for the armature. The A. has a screw-joint connection with the part B. "in .the4 latter art is a Striker F, housing a squared portion *1 passing through a squared opening in the transverse disk G, which disk is seated against a shoulder in the easing'. A spring H encirclesthe shaft of the-striker. bearinn at one end against a Washer J, screwed on the strikerv and at .the other end 'against the 50 aforesaid disk G. Qoviously if the spring, is

- under compression it t'vill tend to drive the l 'striker downward against the anvil ortool K. An annuler cani Llis secured to the-up-y per end of the striker; it incindes'a plurality of spiral hearing surfaces (three being indi- Umorismo nennen.

Specification of Lett-ers latent.

. strikte'1 and springJ are released and a blow produced on the tool K. *The drinn has also Our present deviceis also ofthefkind in 'reciprocating striker, an actuating spring raient-en Jury se.' 1ere.

.cated in the drawing) eaci'terminating in a` saw-tooth point. The cani is inclosed with# in a drum in which rotates (inthe-disk G with intervening balls or@ rollers. i insidev off)i drinn 'li/t ere rollers 0, which are journaled on theidrurn and bear against the spiral surl faces ofthe cainf As the druni. rotates, the rollers, acting on the eain-suraees, lift *the striker against the force of. spring,` H and when they reach the saw-tooth points the n downwardly 'projecting central vstud N mitici-renters a socket in the upper end of the striker and aids in guiding it. The drum is 'fnilso provided With 'short spindle which 'prjects upward through the flanged disk R and ee'rries a driving gear Wheel Pi, that meshes with a pinion P3 on the shalt of getti: Wheel P2 that is'driven by pinion P1 onthe motor shaft. Theshaft which carries gear wheel P2 and pini-onf?3 is journaled in the d AIt and the disk V. which latter also con.- tains the lower bearing of Athe motor shaft. A fan lGr onthe motor shaft provides for ventilation and cooling.

What we clainras new and desire to se cure by LettersV Patent is:

` l. nn' automatic hammer comprising a reciprocating striker, an actuating; spring therefor, un annular-cam for the striker. a cani-operating' member engaging the cani, said -cain and .said operatingn'i'einber being concentric to said striker,v and an electric motor for driving the said member.

2. An auton'xatic hammer comprising a reciprocating striker, an actuating spring therefor, a'spring-tensioning cam secured to x the striker,s an operating member concentric to Said striker and engaging the cain and an electrie motor for driving the said inember.

3. An automat-io herinner comprising a therefor, an, annular springtensioning cam secured to the strike/ryan Operating ineinher outside of said cam out extending inwardly to engage the cani, said cani and said opera ting member being concentric -tosaid striker, and an electric motor for driving said member.

4. An automatic hammer comprising e reeifirocating strikerIn an actuating spring. therefor, n sprinfhtensioning cam concentrie I with Ithe striker, i cani-actuating iuenihcr lli) Outside, of the @am but 'mwmxu t0 engage h @zum with 21, clearance, spiate. above the cam, und 1'; Hmardven' wnntrcwith th @aun n-f driving; the said membar. .I

53. .An axiomatic miams? Comprising s, lecipx'oatng Strike?, am actuanng spag iheref', un annuhu Springtemsmng mm concentfic with the striker. and seured v theretrwth its working cam-surface mi he 1 under 51de, a cam-pemtmg member engaging said @am-surface m1."p'rovded with a depending part outsdce of said 3a-m, amd an eeczric motor 'for' upe'atng said mmbeln An aumnmtc hammer fomp'sngg a rec-pcatng strker, au actuating spring therefor, :L spring-tensioning mm, a @mn-operatnq'melbe: uclosng said @am and, :m elec '1c u'fto having tra shaft n Hue with the 'svsqker and geared to the szz. menubar;

seau to srf. a', Warming member mclesmg the mm and engaging iis under Side with central guida thexfeon for time Smi'ker, :mii a driving motel' for said mgm- 8 im matomaiafhaemne Comprising a f ecp'amang stl-mel, an. mtu-ming spring mexrefor, a spring-tensioning cmu. un operating member, an electric motor Having its shaft in ine with the axis of said member, :md a cuntershft geared o said membef and also t0 *die motn shafm 3. An automatic hamms cmprsng a hummer casing, a recpl'oating srax, an ucumng spring there'fm, an operating member pmvded with mHe-rs bearing on sai cam, a sea, fr Sz. member in the fammmm' casing with intermediate roiug bem ings and ,im electric motor for @diving said mmber.

Sgmd his :Zr (my of Gambe?? 19147. 

